(19)
(11) EP 2 075 867 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
11.11.2009 Bulletin 2009/46

(43) Date of publication A2:
01.07.2009 Bulletin 2009/27

(21) Application number: 08172238.1

(22) Date of filing: 19.12.2008
(51) International Patent Classification (IPC): 
H01M 8/04(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 27.12.2007 JP 2007337515

(71) Applicant: Nissan Motor Co., Ltd.
Kanagawa 221-0023 (JP)

(72) Inventors:
  • Nishimura, Hidetaka
    Atsugi-shi Kanagawa 243-0123 (JP)
  • Osada, Takahito
    Atsugi-shi Kanagawa 243-0123 (JP)
  • Usami, Takatada
    Atsugi-shi Kanagawa 243-0123 (JP)
  • Nakayama, Ken
    Atsugi-shi Kanagawa 243-0123 (JP)
  • Akashi, Kotaro
    Atsugi-shi Kanagawa 243-0123 (JP)

(74) Representative: Hager, Thomas Johannes et al
Hoefer & Partner Patentanwälte Postfach 14 03 29
80453 München
80453 München (DE)

   


(54) Fuel cell system and control method thereof


(57) A fuel cell system having a fuel cell for causing reactant gas to be electrochemically reacted to generate power, a reactant gas supply path for supplying reactant gas to the fuel cell, a reactant gas recirculation path for recirculating exhaust gas discharged from the fuel cell and combining the recirculating exhaust gas with reactant gas flowing through the reactant gas supply path to the fuel cell, and a pump unit disposed in the reactant gas recirculation path to pump the recirculating exhaust gas through the reactant gas recirculation path. A pump-tempering apparatus increases the temperature of the pump unit and a controller controls the pump-tempering apparatus. After the controller receives a fuel cell system stop signal, the controller controls the pump-tempering apparatus such that the temperature of the pump unit becomes higher than the temperature of piping in the reactant gas recirculation path.







Search report